Do you have the alpha for MC 1.7.10? I've been looking for a mod like this for a long time, but the inventory bug is really annoying :/ I wouldn't mind if it's incomplete, if that bug is solved and everything else works like the latest download here.
EDIT: Have you thought about making the project Open Source? Maybe someone can continue your work. This is a really useful mod, something that should have been in the base game.